Looks great. Thanks! I saw this in the layout-files: Configure::check('CA.LightStrap.subtheme'). But if you add the default value in your bootstrap of the plugin (Configure::write....), You don't have to check it but can directly the value ;)

@leoruhland Maybe you should add the breadcrumb in the layout-file and not the templates. That because that custom pages (like the settings page atm) doesn't contain any breadcrumb. Keep in mind that people will add custom pages to the panel and we should display it right ;)